Timing?

[Ieat4strokes]

I've seen some posts of people having thier timing bumped even higher than +4, when should i go higher? I mean benificial wise when will i start to need more timing?

 

 

Thanks

[Paul M]

I think it has alot to do with your porting and compression and the type of fuel you run !

[Ieat4strokes]

well i was at +4 with a stock motor, added a full drag port and 18cc domes, my compression is dead on 150psi per cylinder, can i run race gas and bump it up to say +6 and see some results?

[2001Stroker]

18cc domes and +4 timing, I'd say you probably need 110 octane anyways. Cranking compression doesn't mean anything to me, for octane requirements. All that's for, is making sure both cylinders are close to the same PSI, and lets you know when you need to rebuild the topend. I'm sure with 110, you should be able to go up to +6. Try it, see if anything changes, and see whether or not if you can hear pre-detonation.

[AKheathen]

also, your motor might like less timing. just try different settings within the safe range, and see what feels best. do a plug chop to check for detonation. you should see any specs of metal with a magnifying glass